/Engine/Source/Runtime/Engine/Public/Net/OnlineEngineInterface.h
true if there is a valid URL that can been used to connect to a given session, false otherwise
virtual bool GetResolvedConnectString ( [UWorld](API\Runtime\Engine\Engine\UWorld) * World, [FName](API\Runtime\Core\UObject\FName) SessionName, [FString](API\Runtime\Core\Containers\FString) & URL )